CN109378487A - Treatment method of graphite felt electrode material in zinc iodide battery - Google Patents
Treatment method of graphite felt electrode material in zinc iodide battery Download PDFInfo
- Publication number
- CN109378487A CN109378487A CN201811172563.3A CN201811172563A CN109378487A CN 109378487 A CN109378487 A CN 109378487A CN 201811172563 A CN201811172563 A CN 201811172563A CN 109378487 A CN109378487 A CN 109378487A
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- China
- Prior art keywords
- graphite felt
- battery
- zinc iodide
- electrode material
- water
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
- H01M4/8882—Heat treatment, e.g. drying, baking
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention discloses a method for processing a graphite felt electrode material in a zinc iodide battery, which comprises the following steps: cutting a graphite felt into a required shape and size; (2) Cleaning the cut graphite felt by adopting an RCA standard cleaning method to remove various impurities on the surface and in the channel; (3) The graphite felt is put into a rapid thermal annealing furnace for high-temperature thermal treatment, thereby accelerating the separation of various free radicals and improving the electrical property of the graphite felt. The invention adopts high-temperature annealing to replace the microwave treatment process adopted in the prior art, so that the process is easier to set and control, and the uniformity and the consistency among different batches are better.
Description
Technical Field
The invention relates to an improved electrode material treatment process of a novel zinc iodide battery, and belongs to the technical field of battery systems.
Background
Batteries have been known for over two hundred years since 1799 volts invented. In the 30 s of the last century, the form of the battery mainly adopts a zinc-manganese battery and a lead-acid storage battery; since the second war, people invented lithium batteries due to the development of high-tech technologies, the anode adopts titanium sulfide, and the cathode adopts metal lithium; in the 80 s of the last century, researchers find that lithium ions can be embedded into graphite, and lay a foundation for the emergence of lithium ion batteries in the 90 s of the last century; so far, lithium ion batteries have been the most dominant power supply for portable electronic products.
However, with the widespread use of lithium ion batteries, the disadvantages of lithium ions are gradually discovered, for example, lithium ion batteries mainly use organic electrolyte and are easy to catch fire after being crushed.
In 2015, scientists in the united states used zinc iodide to make liquid flow zinc-iodine batteries, and recently we made non-liquid flow zinc-iodine batteries. The processing of the graphite felt is an important link for manufacturing a non-liquid flow zinc-iodine battery, and the patent 201810289528X can be found in earlier work of the people. However, the current graphite felt has the problems of poor uniformity and poor consistency among different batches.
Disclosure of Invention
The invention aims to provide a method for processing a graphite felt electrode material in a zinc iodide battery to prepare the electrode material of a non-liquid flow zinc iodide battery so as to solve the problems of uniformity and consistency of different batches in the prior art.
The purpose of the invention is realized by the following technical scheme:
the treatment method of the graphite felt electrode material in the zinc iodide battery comprises the following steps:
(1) Cutting the graphite felt into required shapes and sizes;
(2) Cleaning the cut graphite felt by adopting an RCA standard cleaning method to remove various impurities on the surface and in the channel;
(3) The graphite felt is put into a rapid thermal annealing furnace for high-temperature thermal treatment, thereby accelerating the separation of various free radicals and improving the electrical property of the graphite felt.
Furthermore, the method for processing the graphite felt electrode material in the zinc iodide battery comprises the following steps:
(1) Cutting the graphite felt into a required shape, and cleaning by adopting a mixed solution of 98% concentrated sulfuric acid and hydrogen peroxide according to a volume ratio of 1;
(2) Ammonia water is adopted: hydrogen peroxide: treating water at 70-80 deg.c for 5-10 min; then hydrochloric acid is used: hydrogen peroxide: treating water at 70-80 deg.c for 5-10 min;
(3) Then adopting vacuum rapid thermal annealing at 900-950 ℃ for high-temperature rapid thermal annealing for 3-5 minutes; and finally assembling the cation exchange membrane (containing glass fiber felt), the treated graphite felt and other packaging materials, and injecting an electrolyte zinc iodide solution into the battery to form the battery.
In the step (2), ammonia water: hydrogen peroxide: the volume ratio of water is 1; hydrochloric acid: hydrogen peroxide: the volume ratio of water is 1
The water is deionized water, and the resistivity is more than or equal to 15M omega cm.
The invention adopts high-temperature annealing to replace the microwave treatment process adopted in the prior art, so that the process is easier to set and control, and the uniformity and the consistency among different batches are better.
Drawings
FIG. 1 is an electron microscope image of the graphite felt electrode material in the zinc iodide battery of the invention.
Fig. 2 is a charge-discharge curve diagram according to the present invention.
Detailed Description
The technical features of the present invention will be further described with reference to the following embodiments.
Example (b):
the graphite felt is adopted to manufacture the zinc-iodine battery
Purchasing a commercially available graphite felt, one group with a thickness of 1cm, and one group with a thickness of 0.5cm, treating with concentrated sulfuric acid/hydrogen peroxide (volume ratio 1: hydrogen peroxide: water (volume ratio 1.
A graphite felt with the thickness of 1cm is used as an anode, a cation exchange membrane, a glass felt and a graphite felt with the thickness of 0.5cm are added as a cathode, graphite plates are tightly attached to the graphite felt to serve as electrodes, and the electrodes are guided through a guide wire. Zinc iodide solution is injected into the cavity, and simultaneously iodine is added to the battery anode, the mole number of iodine molecules and ZnI 2 The amount used was the same. In addition, the electrolyte is added with a proper amount of alcohol, and the volume of the alcohol is one tenth of the total volume. Thus, a complete battery is completed.
Comparative example:
purchasing a commercially available graphite felt, one group with a thickness of 1cm, and one group with a thickness of 0.5cm, treating with concentrated sulfuric acid/hydrogen peroxide (volume ratio 1: hydrogen peroxide: water (volume ratio 1.
Graphite felt with the thickness of 1cm is used as an anode, then a cation exchange membrane, a glass felt and graphite felt with the thickness of 0.5cm are added as cathodes, and graphite plates are tightly attached to the graphite felt to serve as electrodes for the anode and the cathode, and the anode and the cathode are guided through a lead. And (3) injecting a zinc iodide solution into the cavity, and adding iodine to the anode of the battery, wherein the mole number of iodine molecules is the same as the using amount of ZnI 2. In addition, the electrolyte is added with a proper amount of alcohol, and the volume of the alcohol is one tenth of the total volume. Thus, a complete battery is completed.
All the examples described above use deionized water and have a resistivity of 15 M.OMEGA.cm or higher.
As is evident from the electron micrograph of fig. 1: the graphite felt electrode material has good uniformity, and has larger porosity and body surface area; .
As can be seen from fig. 2 for the charging curve: the graphite felt manufactured in the embodiment 1 is used as an electrode to assemble a zinc-iodine redox flow battery and a charge-discharge test is carried out, the battery prepared by the technical scheme of the invention has the charge current of 60 milliamperes per square centimeter and the charge-discharge efficiency of about 70%.
The negative plate showed no dendrites (precipitated zinc) after 12 hours using the electrolyte of the present invention by electron microscopy.
Through visual observation, no bubbles are generated during the process of using the non-liquid flow zinc-iodine battery.
Claims (4)
1. The treatment method of the graphite felt electrode material in the zinc iodide battery is characterized by comprising the following steps of: the method comprises the following steps:
(1) Cutting the graphite felt into required shapes and sizes;
(2) Cleaning the cut graphite felt by adopting an RCA standard cleaning method to remove various impurities on the surface and in the channel;
(3) The graphite felt is put into a rapid thermal annealing furnace for high-temperature thermal treatment, so that the separation of various free radicals is accelerated, and the electrical property of the graphite felt is improved.
2. The method of claim 1 for treating graphite felt electrode material in a zinc iodide cell, wherein: the method comprises the following steps:
(1) Cutting the graphite felt into a required shape, and firstly cleaning by adopting a mixed solution of 98% concentrated sulfuric acid and hydrogen peroxide according to a volume ratio of 1;
(2) Ammonia water is adopted: hydrogen peroxide: treating water at 70-80 deg.c for 5-10 min; then hydrochloric acid is used: hydrogen peroxide: treating water at 70-80 deg.c for 5-10 min;
(3) Then adopting vacuum rapid thermal annealing at 900-950 ℃ for 3-5 minutes; and finally assembling the cation exchange membrane, the treated graphite felt and other packaging materials, and injecting an electrolyte zinc iodide solution into the battery to form the battery.
3. The method of claim 2 for treating graphite felt electrode material in zinc iodide battery, wherein: in the step (2), ammonia water: hydrogen peroxide: the volume ratio of water is 1; hydrochloric acid: hydrogen peroxide: the volume ratio of water is 1.
4. The method for treating graphite felt electrode material in a zinc iodide battery as claimed in any one of claims 2 or 3, wherein: the treatment method of the graphite felt electrode material in the zinc iodide battery is characterized by comprising the following steps: the water is deionized water, and the resistivity is more than or equal to 15M omega cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811172563.3A CN109378487A (en) | 2018-10-09 | 2018-10-09 | Treatment method of graphite felt electrode material in zinc iodide battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811172563.3A CN109378487A (en) | 2018-10-09 | 2018-10-09 | Treatment method of graphite felt electrode material in zinc iodide battery |
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| Publication Number | Publication Date |
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| CN109378487A true CN109378487A (en) | 2019-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811172563.3A Pending CN109378487A (en) | 2018-10-09 | 2018-10-09 | Treatment method of graphite felt electrode material in zinc iodide battery |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565475A (en) * | 2018-05-08 | 2018-09-21 | 沈阳建筑大学 | A kind of method of modifying of graphite felt electrode |
| CN108565470A (en) * | 2018-04-17 | 2018-09-21 | 大连隆田科技有限公司 | A kind of preparation method of flow battery graphite felt |
| CN108615885A (en) * | 2018-04-03 | 2018-10-02 | 华东师范大学 | A kind of graphite felt treatment process |
| CN108615901A (en) * | 2018-05-04 | 2018-10-02 | 广州市泓能五金有限公司 | Improve the active processing method of vanadium cell graphite felt electrode |
-
2018
- 2018-10-09 CN CN201811172563.3A patent/CN109378487A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108615885A (en) * | 2018-04-03 | 2018-10-02 | 华东师范大学 | A kind of graphite felt treatment process |
| CN108565470A (en) * | 2018-04-17 | 2018-09-21 | 大连隆田科技有限公司 | A kind of preparation method of flow battery graphite felt |
| CN108615901A (en) * | 2018-05-04 | 2018-10-02 | 广州市泓能五金有限公司 | Improve the active processing method of vanadium cell graphite felt electrode |
| CN108565475A (en) * | 2018-05-08 | 2018-09-21 | 沈阳建筑大学 | A kind of method of modifying of graphite felt electrode |
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Application publication date: 20190222 |
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